Arena Inamar
Distrital do Inamar  | |
| Full name | Estádio Municipal José Batista Pereira Fernandes | 
|---|---|
| Location | Diadema, SP, Brazil | 
| Coordinates | 23°43′21″S 46°36′47″W / 23.722610799838492°S 46.613087791572255°W | 
| Owner | City of Diadema | 
| Operator | City of Diadema | 
| Capacity | 10,000 | 
| Record attendance | 7,283 (Água Santa vs São Bernardo, 10 April 2016) | 
| Field size | 105 by 68 metres (114.8 yd × 74.4 yd) | 
| Surface | Natural grass | 
| Construction | |
| Opened | 22 May 2009 | 
| Renovated | 2012, 2014, 2019–2020 | 
| Expanded | 2015 | 
| Construction cost | R$ 12–15 million | 
| Tenants | |
| Clube Atlético Diadema (2009–2019) Água Santa (2012–)  | |
Estádio Municipal José Batista Pereira Fernandes, known as Distrital do Inamar or Arena Inamar, is a football stadium in Diadema, São Paulo, Brazil. It has a maximum capacity of 10,000 people, and hosts the home matches of Água Santa.